Description

The HOYA iSert 251 Monofocal Preloaded Intraocular Lens (IOL) is a sophisticated solution designed for seamless implantation during cataract surgery. Developed by HOYA Surgical Optics GmbH, this lens offers a range of features aimed at enhancing visual outcomes and surgical efficiency.

Advanced Optic Design

• Material: The lens is crafted from hydrophobic acrylic, providing durability and clarity.
• Aspheric Design: Its aspheric, aberration-correcting design helps improve visual quality by reducing optical aberrations.
• Edge Design: A sharp, square edge encircles the lens to minimize the risk of posterior capsule opacification (PCO).
• Filters: Integrated UV and blue light filters offer additional protection, with a light transmission rate exceeding 95%.

Dimensions

• Optic Diameter: 6.0 mm
• Overall Length: 12.5 mm

Haptic Configuration

The lens features a modified C-loop haptic design with a 5° angulation, ensuring stable positioning and self-centralization within the capsular bag. The haptic tips are made from blue PMMA, chemically bonded for enhanced performance.

Power Range

Available in powers ranging from +6.00 D to +30.00 D in 0.50 D increments, this IOL caters to a wide array of patient needs.

Preloaded Injector System

The iSert preloaded injector system is a single-use, dry assembly device that facilitates controlled lens delivery through a microincision. Key features include:

• Incision Compatibility: 2.2–2.75 mm
• Injector Tip Diameter: 1.82 mm
• Plunger Type: Screw
• Delivery: Bevel down, with no rotation required

Surgical Efficiency

The preloaded system reduces the risk of contamination and misloading, while the sharp edge design minimizes incision size and surgically induced astigmatism. The use of an ophthalmic viscoelastic device (OVD) is mandatory, with lens insertion recommended within 3 minutes after advancing the slider.

Optical Constants

• Nominal A-constant: 118.4
• Optimized Constants:
• Haigis: a0 = -0.542, a1 = 0.161, a2 = 0.204
• Hoffer Q: pACD = 5.30
• Holladay 1: sf = 1.52
• SRK/T: A = 118.5

Regulatory and Performance Track Record

The HOYA iSert 251 is both CE marked and FDA approved, with over 10 million units implanted worldwide. Its long-standing track record spans 15–20 years, demonstrating consistent performance and reliability.

Handling Instructions

The implantation process involves straightforward steps: removing the injector from its pouch, infusing OVD, removing the cover, advancing the slider, and using the screw plunger to inject the lens. No injector rotation is needed during delivery, ensuring ease of use.

Indications

This monofocal IOL is intended for use in patients undergoing cataract surgery, providing a reliable and effective solution for restoring vision.